loop0: detected capacity change from 0 to 512 ------------[ cut here ]------------ kernel BUG at fs/buffer.c:2714! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 960 Comm: syz.0.152 Not tainted 6.1.112-syzkaller-00005-geef3d33656ce #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:submit_bh_wbc+0x4cd/0x4f0 fs/buffer.c:2714 Code: c3 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c bd fe ff ff 48 89 df e8 14 d0 e6 ff e9 b0 fe ff ff e8 6a 66 9f ff 0f 0b e8 63 66 9f ff <0f> 0b e8 5c 66 9f ff 0f 0b e8 55 66 9f ff 0f 0b e8 4e 66 9f ff 0f RSP: 0018:ffffc900037776b8 EFLAGS: 00010287 RAX: ffffffff81d63dad RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90001149000 RSI: 00000000000015b3 RDI: 00000000000015b4 RBP: ffffc90003777708 R08: ffffffff81d63980 R09: ffffed102662ee01 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff1102662ee00 R14: ffff888133177000 R15: 0000000000003000 FS: 00007efc969ae6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd49f460300 CR3: 00000001104f4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: submit_bh+0x1d/0x30 fs/buffer.c:2755 __ext4_read_bh fs/ext4/super.c:175 [inline] ext4_read_bh+0x1b2/0x250 fs/ext4/super.c:199 read_mmp_block+0x155/0x7d0 fs/ext4/mmp.c:97 ext4_multi_mount_protect+0x600/0x9c0 fs/ext4/mmp.c:378 __ext4_fill_super fs/ext4/super.c:5279 [inline] ext4_fill_super+0x59f8/0x8460 fs/ext4/super.c:5651 get_tree_bdev+0x440/0x680 fs/super.c:1368 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5681 vfs_get_tree+0x88/0x290 fs/super.c:1575 do_new_mount+0x2ba/0xb30 fs/namespace.c:3051 path_mount+0x671/0x1070 fs/namespace.c:3381 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3579 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3579 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7efc95b7feba Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efc969ade68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007efc969adef0 RCX: 00007efc95b7feba RDX: 0000000020000180 RSI: 0000000020000140 RDI: 00007efc969adeb0 RBP: 0000000020000180 R08: 00007efc969adef0 R09: 000000000021081e R10: 000000000021081e R11: 0000000000000246 R12: 0000000020000140 R13: 00007efc969adeb0 R14: 0000000000000504 R15: 00000000200000c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:submit_bh_wbc+0x4cd/0x4f0 fs/buffer.c:2714 Code: c3 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c bd fe ff ff 48 89 df e8 14 d0 e6 ff e9 b0 fe ff ff e8 6a 66 9f ff 0f 0b e8 63 66 9f ff <0f> 0b e8 5c 66 9f ff 0f 0b e8 55 66 9f ff 0f 0b e8 4e 66 9f ff 0f RSP: 0018:ffffc900037776b8 EFLAGS: 00010287 RAX: ffffffff81d63dad RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90001149000 RSI: 00000000000015b3 RDI: 00000000000015b4 RBP: ffffc90003777708 R08: ffffffff81d63980 R09: ffffed102662ee01 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff1102662ee00 R14: ffff888133177000 R15: 0000000000003000 FS: 00007efc969ae6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003d28 CR3: 00000001104f4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400